An Online Soft Measurement Method for Sand Return Ratio in Grinding and Classifying Process

Abstract

The invention discloses an on-line soft measurement method for the sand return ratio in the grinding and grading process. First, the cyclone feeding flow, pressure and concentration are detected in real time, and the real-time detection data is archived in a database; then the soft measurement algorithm parameter calculation is completed; and then selected The calculation period of the soft measurement of the sand return ratio, and finally the online calculation of the sand return ratio. The online algorithm of the present invention only relies on the on-line measurement values ​​of flow rate, pressure and concentration of the hydrocyclone to realize the on-line soft measurement of the sand return ratio; the off-line multiple sampling method is used to determine the parameters, and the least square method is used when calculating the parameters to ensure The calculation error of the return sand ratio is minimized.

Description

technical field [0001] The invention relates to an online soft measurement method for parameters of a technological process, in particular to an online measurement method for the sand return ratio of a grinding and classification process. Background technique [0002] The sand return ratio refers to the ratio of the amount of sand settling in the cyclone to the overflowing dry ore in the grinding and classifying process, and is an important indicator to measure the efficiency of the mill and the classifying efficiency of the cyclone in the grinding and classifying process. If the sand return ratio is too low, it often indicates that the classification efficiency of the cyclone is low, and the overflow is "coarse"; while if the sand return ratio is too high, it often indicates that the mill is overloaded, which not only makes it difficult to meet the grinding particle size, but also causes waste of electric energy. Therefore, in order to make the product particle size of the ...

AI Technical Summary

Problems solved by technology

However, this method can only obtain the value of the sand return ratio at the time of sampling; and the working period from the completion of sampling to the calculation of the results is long, the fastest is about 3-4 days

For production processes that are constantly changing dynamically, this greatly weakens the value of this method for guiding production

Images